tinyCTF 2014: add “ECB, it’s easy as 123” write-up

Closes #151.
tinyCTF 2014: link to @stevecoward’s write-ups

Closes #157.
tinyCTF 2014: correct mistake

The problem is a cryptogram, not a Vigenère cipher.

Closes #152.
CSAW CTF 2014: added ‘csaw2013reversing2.exe’ write-up

Closes #142.
Merge branch 'master' of github.com:tprynn/write-ups